gleam/dynamic
Types
Error returned when unexpected data is encountered
pub type DecodeError {
DecodeError(
expected: String,
found: String,
path: List(String),
)
}
Constructors
-
DecodeError(expected: String, found: String, path: List(String))
pub type DecodeErrors =
List(DecodeError)
Functions
pub fn any(
of decoders: List(fn(Dynamic) -> Result(a, List(DecodeError))),
) -> fn(Dynamic) -> Result(a, List(DecodeError))
Joins multiple decoders into one. When run they will each be tried in turn until one succeeds, or they all fail.
Examples
import gleam/result
let bool_or_string = any(of: [
string,
fn(x) { result.map(bool(x), fn(_) { "a bool" }) }
])
bool_or_string(from("ok"))
// -> Ok("ok")
bool_or_string(from(True))
// -> Ok("a bool")
bool_or_string(from(1))
// -> Error(DecodeError(expected: "another type", found: "Int", path: []))
pub fn bit_array(
from data: Dynamic,
) -> Result(BitArray, List(DecodeError))
Checks to see whether a Dynamic
value is a bit array, and returns that bit
array if it is.
Examples
import gleam/bit_array
bit_array(from("Hello")) == bit_array.from_string("Hello")
// -> True
bit_array(from(123))
// -> Error([DecodeError(expected: "BitArray", found: "Int", path: [])])
pub fn bool(
from data: Dynamic,
) -> Result(Bool, List(DecodeError))
Checks to see whether a Dynamic
value is a bool, and returns that bool if
it is.
Examples
bool(from(True))
// -> Ok(True)
bool(from(123))
// -> Error([DecodeError(expected: "Bool", found: "Int", path: [])])
pub fn classify(data: Dynamic) -> String
Return a string indicating the type of the dynamic value.
classify(from("Hello"))
// -> "String"
pub fn decode1(
constructor: fn(a) -> b,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
) -> fn(Dynamic) -> Result(b, List(DecodeError))
Decode 1 values from a Dynamic
value.
Examples
from(#(1, 2.0, "3")) |> decode1(MyRecord, element(0, int))
// -> Ok(MyRecord(1))
from(#("", "", "")) |> decode1(MyRecord, element(0, int))
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// ])
pub fn decode2(
constructor: fn(a, b) -> c,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(c, List(DecodeError))
Decode 2 values from a Dynamic
value.
Examples
from(#(1, 2.0, "3"))
|> decode2(MyRecord, element(0, int), element(1, float))
// -> Ok(MyRecord(1, 2.0))
from(#("", "", ""))
|> decode2(MyRecord, element(0, int), element(1, float))
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode3(
constructor: fn(a, b, c) -> d,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
) -> fn(Dynamic) -> Result(d, List(DecodeError))
Decode 3 values from a Dynamic
value.
Examples
from(#(1, 2.0, "3"))
|> decode3(MyRecord, element(0, int), element(1, float), element(2, string))
// -> Ok(MyRecord(1, 2.0, "3"))
from(#("", "", ""))
|> decode3(MyRecord, element(0, int), element(1, float), element(2, string))
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode4(
constructor: fn(a, b, c, d) -> e,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
) -> fn(Dynamic) -> Result(e, List(DecodeError))
Decode 4 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4"))
|> decode4(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4"))
from(#("", "", "", ""))
|> decode4(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode5(
constructor: fn(a, b, c, d, e) -> f,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
t5: fn(Dynamic) -> Result(e, List(DecodeError)),
) -> fn(Dynamic) -> Result(f, List(DecodeError))
Decode 5 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4", "5"))
|> decode5(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4", "5"))
from(#("", "", "", "", ""))
|> decode5(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode6(
constructor: fn(a, b, c, d, e, f) -> g,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
t5: fn(Dynamic) -> Result(e, List(DecodeError)),
t6: fn(Dynamic) -> Result(f, List(DecodeError)),
) -> fn(Dynamic) -> Result(g, List(DecodeError))
Decode 6 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4", "5", "6"))
|> decode6(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4", "5", "6"))
from(#("", "", "", "", "", ""))
|> decode6(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode7(
constructor: fn(a, b, c, d, e, f, g) -> h,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
t5: fn(Dynamic) -> Result(e, List(DecodeError)),
t6: fn(Dynamic) -> Result(f, List(DecodeError)),
t7: fn(Dynamic) -> Result(g, List(DecodeError)),
) -> fn(Dynamic) -> Result(h, List(DecodeError))
Decode 7 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4", "5", "6"))
|> decode7(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4", "5", "6", "7"))
from(#("", "", "", "", "", "", ""))
|> decode7(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode8(
constructor: fn(a, b, c, d, e, f, g, h) -> i,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
t5: fn(Dynamic) -> Result(e, List(DecodeError)),
t6: fn(Dynamic) -> Result(f, List(DecodeError)),
t7: fn(Dynamic) -> Result(g, List(DecodeError)),
t8: fn(Dynamic) -> Result(h, List(DecodeError)),
) -> fn(Dynamic) -> Result(i, List(DecodeError))
Decode 8 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4", "5", "6", "7", "8"))
|> decode8(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
element(7, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4", "5", "6", "7", "8"))
from(#("", "", "", "", "", "", "", ""))
|> decode8(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
element(7, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn decode9(
constructor: fn(a, b, c, d, e, f, g, h, i) -> j,
t1: fn(Dynamic) -> Result(a, List(DecodeError)),
t2: fn(Dynamic) -> Result(b, List(DecodeError)),
t3: fn(Dynamic) -> Result(c, List(DecodeError)),
t4: fn(Dynamic) -> Result(d, List(DecodeError)),
t5: fn(Dynamic) -> Result(e, List(DecodeError)),
t6: fn(Dynamic) -> Result(f, List(DecodeError)),
t7: fn(Dynamic) -> Result(g, List(DecodeError)),
t8: fn(Dynamic) -> Result(h, List(DecodeError)),
t9: fn(Dynamic) -> Result(i, List(DecodeError)),
) -> fn(Dynamic) -> Result(j, List(DecodeError))
Decode 9 values from a Dynamic
value.
Examples
from(#(1, 2.1, "3", "4", "5", "6", "7", "8", "9"))
|> decode9(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
element(7, string),
element(8, string),
)
// -> Ok(MyRecord(1, 2.1, "3", "4", "5", "6", "7", "8", "9"))
from(#("", "", "", "", "", "", "", "", ""))
|> decode9(
MyRecord,
element(0, int),
element(1, float),
element(2, string),
element(3, string),
element(4, string),
element(5, string),
element(6, string),
element(7, string),
element(8, string),
)
// -> Error([
// DecodeError(expected: "Int", found: "String", path: ["0"]),
// DecodeError(expected: "Float", found: "String", path: ["1"]),
// ])
pub fn dict(
of key_type: fn(Dynamic) -> Result(a, List(DecodeError)),
to value_type: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(Dict(a, b), List(DecodeError))
Checks to see if a Dynamic
value is a dict.
Examples
import gleam/dict
dict.new() |> from |> map(string, int)
// -> Ok(dict.new())
from(1) |> map(string, int)
// -> Error(DecodeError(expected: "Map", found: "Int", path: []))
from("") |> map(string, int)
// -> Error(DecodeError(expected: "Map", found: "String", path: []))
pub fn dynamic(
value: Dynamic,
) -> Result(Dynamic, List(DecodeError))
Decodes a Dynamic
value from a Dynamic
value.
This function doesn’t seem very useful at first, but it can be convenient when you need to give a decoder function but you don’t actually care what the to-decode value is.
pub fn element(
at index: Int,
of inner_type: fn(Dynamic) -> Result(a, List(DecodeError)),
) -> fn(Dynamic) -> Result(a, List(DecodeError))
Checks to see if a Dynamic
value is a tuple large enough to have a certain
index, and returns the value of that index if it is.
Examples
from(#(1, 2))
|> element(0, int)
// -> Ok(from(1))
from(#(1, 2))
|> element(2, int)
// -> Error([
// DecodeError(
// expected: "Tuple of at least 3 elements",
// found: "Tuple of 2 elements",
// path: [],
// ),
// ])
pub fn field(
named name: a,
of inner_type: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(b, List(DecodeError))
Checks to see if a Dynamic
value is a map with a specific field, and returns
the value of that field if it is.
This will not succeed on a record.
Examples
import gleam/dict
dict.new()
|> dict.insert("Hello", "World")
|> from
|> field(named: "Hello", of: string)
// -> Ok("World")
from(123) |> field("Hello", string)
// -> Error([DecodeError(expected: "Map", found: "Int", path: [])])
pub fn float(
from data: Dynamic,
) -> Result(Float, List(DecodeError))
Checks to see whether a Dynamic
value is a float, and returns that float if
it is.
Examples
float(from(2.0))
// -> Ok(2.0)
float(from(123))
// -> Error([DecodeError(expected: "Float", found: "Int", path: [])])
pub fn int(from data: Dynamic) -> Result(Int, List(DecodeError))
Checks to see whether a Dynamic
value is an int, and returns that int if it
is.
Examples
int(from(123))
// -> Ok(123)
int(from("Hello"))
// -> Error([DecodeError(expected: "Int", found: "String", path: [])])
pub fn list(
of decoder_type: fn(Dynamic) -> Result(a, List(DecodeError)),
) -> fn(Dynamic) -> Result(List(a), List(DecodeError))
Checks to see whether a Dynamic
value is a list of a particular type, and
returns that list if it is.
The second argument is a decoder function used to decode the elements of the list. The list is only decoded if all elements in the list can be successfully decoded using this function.
If you do not wish to decode all the elements in the list use the shallow_list
function instead.
Examples
from(["a", "b", "c"]) |> list(of: string)
// -> Ok(["a", "b", "c"])
from([1, 2, 3]) |> list(of: string)
// -> Error([DecodeError(expected: "String", found: "Int", path: ["*"])])
from("ok") |> list(of: string)
// -> Error([DecodeError(expected: "List", found: "String", path: [])])
pub fn optional(
of decode: fn(Dynamic) -> Result(a, List(DecodeError)),
) -> fn(Dynamic) -> Result(Option(a), List(DecodeError))
Checks to see if a Dynamic
value is a nullable version of a particular
type, and returns a corresponding Option
if it is.
Examples
from("Hello") |> optional(string)
// -> Ok(Some("Hello"))
from("Hello") |> optional(string)
// -> Ok(Some("Hello"))
import gleam/erlang/atom
from(atom.from_string("null")) |> optional(string)
// -> Ok(None)
import gleam/erlang/atom
from(atom.from_string("nil")) |> optional(string)
// -> Ok(None)
import gleam/erlang/atom
from(atom.from_string("undefined")) |> optional(string)
// -> Ok(None)
from(123) |> optional(string)
// -> Error([DecodeError(expected: "String", found: "Int", path: [])])
pub fn optional_field(
named name: a,
of inner_type: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(Option(b), List(DecodeError))
Checks to see if a Dynamic
value is a map with a specific field.
If the map does not have the specified field, returns an Ok(None)
instead of failing; otherwise,
returns the decoded field wrapped in Some(_)
.
Examples
import gleam/dict
dict.new()
|> dict.insert("Hello", "World")
|> from
|> optional_field(named: "Hello", of: string)
// -> Ok(Some("World"))
import gleam/dict
dict.new()
|> from
|> optional_field(named: "Hello", of: string)
// -> Ok(None)
from(123)
|> optional_field("Hello", string)
// -> Error([DecodeError(expected: "Map", found: "Int", path: [])])
pub fn result(
ok decode_ok: fn(Dynamic) -> Result(a, List(DecodeError)),
error decode_error: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(Result(a, b), List(DecodeError))
Checks to see whether a Dynamic
value is a result of a particular type, and
returns that result if it is.
The ok
and error
arguments are decoders for decoding the Ok
and
Error
values of the result.
Examples
from(Ok(1)) |> result(ok: int, error: string)
// -> Ok(Ok(1))
from(Error("boom")) |> result(ok: int, error: string)
// -> Ok(Error("boom"))
from(123) |> result(ok: int, error: string)
// -> Error([DecodeError(expected: "Result", found: "Int", path: [])])
pub fn shallow_list(
from value: Dynamic,
) -> Result(List(Dynamic), List(DecodeError))
Checks to see whether a Dynamic
value is a list, and returns that list if it
is. The types of the elements are not checked.
If you wish to decode all the elements in the list use the list
function
instead.
Examples
shallow_list(from(["a", "b", "c"]))
// -> Ok([from("a"), from("b"), from("c")])
shallow_list(1)
// -> Error([DecodeError(expected: "List", found: "Int", path: [])])
pub fn string(
from data: Dynamic,
) -> Result(String, List(DecodeError))
Checks to see whether a Dynamic
value is a string, and returns that string if
it is.
Examples
string(from("Hello"))
// -> Ok("Hello")
string(from(123))
// -> Error([DecodeError(expected: "String", found: "Int", path: [])])
pub fn tuple2(
first decode1: fn(Dynamic) -> Result(a, List(DecodeError)),
second decode2: fn(Dynamic) -> Result(b, List(DecodeError)),
) -> fn(Dynamic) -> Result(#(a, b), List(DecodeError))
Checks to see if a Dynamic
value is a 2-element tuple, list or array containing
specifically typed elements.
Examples
from(#(1, 2))
|> tuple2(int, int)
// -> Ok(#(1, 2))
from(#(1, 2.0))
|> tuple2(int, float)
// -> Ok(#(1, 2.0))
from([1, 2])
|> tuple2(int, int)
// -> Ok(#(1, 2))
from([from(1), from(2.0)])
|> tuple2(int, float)
// -> Ok(#(1, 2.0))
from(#(1, 2, 3))
|> tuple2(int, float)
// -> Error([
// DecodeError(
// expected: "Tuple of 2 elements",
// found: "Tuple of 3 elements",
// path: [],
// ),
// ])
from("")
|> tuple2(int, float)
// -> Error([
// DecodeError(
// expected: "Tuple of 2 elements",
// found: "String",
// path: [],
// ),
// ])
pub fn tuple3(
first decode1: fn(Dynamic) -> Result(a, List(DecodeError)),
second decode2: fn(Dynamic) -> Result(b, List(DecodeError)),
third decode3: fn(Dynamic) -> Result(c, List(DecodeError)),
) -> fn(Dynamic) -> Result(#(a, b, c), List(DecodeError))
Checks to see if a Dynamic
value is a 3-element tuple, list or array containing
specifically typed elements.
Examples
from(#(1, 2, 3))
|> tuple3(int, int, int)
// -> Ok(#(1, 2, 3))
from(#(1, 2.0, "3"))
|> tuple3(int, float, string)
// -> Ok(#(1, 2.0, "3"))
from([1, 2, 3])
|> tuple3(int, int, int)
// -> Ok(#(1, 2, 3))
from([from(1), from(2.0), from("3")])
|> tuple3(int, float, string)
// -> Ok(#(1, 2.0, "3"))
from(#(1, 2))
|> tuple3(int, float, string)
// -> Error([
// DecodeError(
// expected: "Tuple of 3 elements",
// found: "Tuple of 2 elements",
// path: [],
// ),
// ])
from("")
|> tuple3(int, float, string)
// -> Error([
// DecodeError(
// expected: "Tuple of 3 elements",
// found: "String",
// path: [],
// ),
// ])
pub fn tuple4(
first decode1: fn(Dynamic) -> Result(a, List(DecodeError)),
second decode2: fn(Dynamic) -> Result(b, List(DecodeError)),
third decode3: fn(Dynamic) -> Result(c, List(DecodeError)),
fourth decode4: fn(Dynamic) -> Result(d, List(DecodeError)),
) -> fn(Dynamic) -> Result(#(a, b, c, d), List(DecodeError))
Checks to see if a Dynamic
value is a 4-element tuple, list or array containing
specifically typed elements.
Examples
from(#(1, 2, 3, 4))
|> tuple4(int, int, int, int)
// -> Ok(#(1, 2, 3, 4))
from(#(1, 2.0, "3", 4))
|> tuple4(int, float, string, int)
// -> Ok(#(1, 2.0, "3", 4))
from([1, 2, 3, 4])
|> tuple4(int, int, int, int)
// -> Ok(#(1, 2, 3, 4))
from([from(1), from(2.0), from("3"), from(4)])
|> tuple4(int, float, string, int)
// -> Ok(#(1, 2.0, "3", 4))
from(#(1, 2))
|> tuple4(int, float, string, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 4 elements",
// found: "Tuple of 2 elements",
// path: [],
// ),
// ])
from("")
|> tuple4(int, float, string, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 4 elements",
// found: "String",
// path: [],
// ),
// ])
pub fn tuple5(
first decode1: fn(Dynamic) -> Result(a, List(DecodeError)),
second decode2: fn(Dynamic) -> Result(b, List(DecodeError)),
third decode3: fn(Dynamic) -> Result(c, List(DecodeError)),
fourth decode4: fn(Dynamic) -> Result(d, List(DecodeError)),
fifth decode5: fn(Dynamic) -> Result(e, List(DecodeError)),
) -> fn(Dynamic) -> Result(#(a, b, c, d, e), List(DecodeError))
Checks to see if a Dynamic
value is a 5-element tuple, list or array containing
specifically typed elements.
Examples
from(#(1, 2, 3, 4, 5))
|> tuple5(int, int, int, int, int)
// -> Ok(#(1, 2, 3, 4, 5))
from(#(1, 2.0, "3", 4, 5))
|> tuple5(int, float, string, int, int)
// -> Ok(#(1, 2.0, "3", 4, 5))
from([1, 2, 3, 4, 5])
|> tuple5(int, int, int, int, int)
// -> Ok(#(1, 2, 3, 4, 5))
from([from(1), from(2.0), from("3"), from(4), from(True)])
|> tuple5(int, float, string, int, bool)
// -> Ok(#(1, 2.0, "3", 4, True))
from(#(1, 2))
|> tuple5(int, float, string, int, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 5 elements",
// found: "Tuple of 2 elements",
// path: [],
// ),
// ])
from("")
|> tuple5(int, float, string, int, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 5 elements",
// found: "String",
// path: [],
// ),
// ])
pub fn tuple6(
first decode1: fn(Dynamic) -> Result(a, List(DecodeError)),
second decode2: fn(Dynamic) -> Result(b, List(DecodeError)),
third decode3: fn(Dynamic) -> Result(c, List(DecodeError)),
fourth decode4: fn(Dynamic) -> Result(d, List(DecodeError)),
fifth decode5: fn(Dynamic) -> Result(e, List(DecodeError)),
sixth decode6: fn(Dynamic) -> Result(f, List(DecodeError)),
) -> fn(Dynamic) ->
Result(#(a, b, c, d, e, f), List(DecodeError))
Checks to see if a Dynamic
value is a 6-element tuple, list or array containing
specifically typed elements.
Examples
from(#(1, 2, 3, 4, 5, 6))
|> tuple6(int, int, int, int, int, int)
// -> Ok(#(1, 2, 3, 4, 5, 6))
from(#(1, 2.0, "3", 4, 5, 6))
|> tuple6(int, float, string, int, int, int)
// -> Ok(#(1, 2.0, "3", 4, 5, 6))
from([1, 2, 3, 4, 5, 6])
|> tuple6(int, int, int, int, int, int)
// -> Ok(#(1, 2, 3, 4, 5, 6))
from([from(1), from(2.0), from("3"), from(4), from(True), from(False)])
|> tuple6(int, float, string, int, bool, bool)
// -> Ok(#(1, 2.0, "3", 4, True, False))
from(#(1, 2))
|> tuple6(int, float, string, int, int, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 6 elements",
// found: "Tuple of 2 elements",
// path: [],
// ),
// ])
from("")
|> tuple6(int, float, string, int, int, int)
// -> Error([
// DecodeError(
// expected: "Tuple of 6 elements",
// found: "String",
// path: [],
// ),
// ])
pub fn unsafe_coerce(a: Dynamic) -> a
Unsafely casts a Dynamic value into any other type.
This is an escape hatch for the type system that may be useful when wrapping native Erlang APIs. It is to be used as a last measure only!
If you can avoid using this function, do!